ASTROSAT CZTI

Data Quality Report

Orbit 20180425_G08_076T01_9000002056_level2

Creation date: 2018-04-27T15:47:57.970589
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1G08_076T01_9000002056cztM0_level2_bc.evt modeM0/AS1G08_076T01_9000002056cztM0_level2_quad_clean.evt
Size (bytes)1,054,860,480399,101,760
Size1006.0 MB 380.6 MB
Events in quadrant A5,911,4912,443,582
Events in quadrant B6,465,6302,489,912
Events in quadrant C6,748,0732,621,868
Events in quadrant D10,765,5532,464,283

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0330
B0330
C0330
D0330

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0618510
B0631220
C0624020
D0762160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06140
B06140
C06140
D06140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A300963171.053296%
B300964191.392212%
C300962210.734317%
D300968022.664806%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 33362 30098 8 8 0.02% 0.03%
B 33362 30096 3 3 0.01% 0.01%
C 33362 30096 0 0 0.00% 0.00%
D 33362 30097 21 21 0.06% 0.07%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 8 15 55791 167.47 1484 1451 324.5
A 1 162 48877 146.16 1484 1451 324.5
A 4 2 34036 100.43 1484 1451 324.5
B 0 214 131983 454.79 1506 1465 287.0
B 10 245 117397 403.96 1506 1465 287.0
B 10 244 111997 385.15 1506 1465 287.0
C 3 233 747186 2162.41 1525 1508 344.8
C 14 234 21584 58.22 1525 1508 344.8
C 8 128 13483 34.73 1525 1508 344.8
D 1 52 2103891 5994.22 1489 1445 350.7
D 13 189 649656 1848.09 1489 1445 350.7
D 8 195 594195 1689.97 1489 1445 350.7

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter